Did you mention you have traders who trade options for ECN Rebates? I would like to try something like that because I churn lots of weeklies using different routes and some routes get filled faster than others, that's a fact. Here's a weird trade I had last year, I am long a stock via options in several different brokerage accounts with routing.
I buy 500 contracts of a wild stock with stock option volume 100x its normal volume. I route via CBOE 300 contracts at $4.40-$4.50 (Market is $3.60 x $4.10 stock is moving wildly and frantically up) while I post the rest on AMEX and BATS and Citadel.
CBOE has a print at 8000 contracts at $4.60 and my order get's filled with that consolidated print, all 300 contracts got filled at $4.60 pre-arranged trade and the other 200 options on AMEX, BATS, GMNI and NYSE and Nasdaq just sit. Finally 50 of my AMEX are gone at $4.40 and BATS and Citadel are still sitting. I cancelled those orders and the Market at $4.20 where BATS and Citadel raises to $3.90 x $5.10. Soon it's $4.70 x $6.90 and moving fast, I put contracts out on CBOE and get filled instantly at $6.50. Why did my order sit on BATS and Citadel's GMNI, NYSE routes and how did I get to cancel a stock option that had moved way past my order?